What is the source of the second photo?
I simply can't go into to much detail about the 2nd poster (at least, not right now until I myself am certain of a few things about the source) however I always want to help people on here as much as the next person, all I can really say is be careful with all posters but especially Thai posters, I've only been collecting posters for a few years and I own a reasonable collection of Thai posters, but, from personal experience they are often the worst when it comes to fakes or as others may prefer to call them commercial reprints.
I love Thai posters because of the unique amazing artwork so many of them have, but, I've found collecting them to be a bit of a minefield, you only have to look on the likes of ebay to see how many get sold on there every day, it's pretty clear "IMO" that many out there are not "Original" 1st release posters.
All I would say is with T confirming what I expected in that his Thai JAWS is the real deal genuine article that's good enough for me in that I trust his obvious knowledge on the subject, therefore I'm glad I'm learning myself what to look out for.
I was offered the 2nd JAWS poster but something felt off about it.